私はここでコードを満たしました:
>>> import urllib, re
>>> prefix = "http://www.pythonchallenge.com/pc/def/linkedlist.php?nothing="
>>> findnothing = re.compile(r"nothing is (\d+)").search
>>> nothing = '12345'
>>> while True:
...     text = urllib.urlopen(prefix + nothing).read()
...     print text
...     match = findnothing(text)
...     if match:
...         nothing = match.group(1)
...         print "   going to", nothing
...     else:
...         break
1inはどういうmatch.group(1)意味ですか?